add netlify builder to capture social images

plus also added an invalidator that should invalidate the image each
month

app/web/src/pages/ProjectPage/ProjectPage.tsx

@@ -9,9 +9,11 @@ import { Toaster } from '@redwoodjs/web/toast'
 const ProjectPage = ({ userName, projectTitle }) => {
   const { currentUser } = useAuth()
   const [state, thunkDispatch] = useIdeState()
+  const cacheInvalidator = new Date().toISOString().split('-').slice(0, 2).join('-')
+  const socialImageUrl = `/.netlify/functions/og-image-generator/${userName}/${projectTitle}/og-image-${cacheInvalidator}.jpg`
   return (
     <>
-      <Seo title={projectTitle} description={projectTitle} lang="en-US" />
+      <Seo title={projectTitle} description={projectTitle} socialImageUrl={socialImageUrl} lang="en-US" />
       <Toaster timeout={1500} />
       <IdeContext.Provider value={{ state, thunkDispatch, project: null }}>
         <ProjectCell